I painted my recently too, used a caliper paint kit (Dupli-color).
Came with caliper cleaner, paint, tape, and a brush (no spray
Masking off the caliper woulda been too much of a pain, so I just free-handed it with the brush, I think it came out fairly well. I didn't do absolutely every part of the caliper (the metal-looking parts I left alone, while the rouger surfaced areas I sanded and painted). I'll post some pics up when I have a chance to take some
I did this a few weeks ago, I'm just not on the ball lately!
Oh yeah, the kit was like $15 or so from Kragen
Considering how much everything else costs around here, it didn't seem too bad!